The campsite was great, and I really recommend this as a summer destination. Water Canyon Beach is as beautiful as it looks in the photos. I had 2 or 3 beautiful sunny days lounging on the soft sand, and cooling off in the crystal clear water. There are fox tracks in the sand on the beach. You can follow them to see what the foxes were up to the previous night. I was there in August during a heat wave, and the water was super refreshing. I was standing in waist deep water watching the (harmless) leopard sharks swim past in the sandy spots. I didn't have my mask and snorkel, but that would have been a great idea too.
If you go to the top of the campground, I think it is behind campsite #16, there is a trail that leads down to the stream at Water Canyon. There I found waist-deep pools of clear water with polywogs swimming in them, so I am sure the place is filled with frogs. It seems like it is possible to hike upstream and there was one tributary branch that looked like it was wide and passable for the hikers to explore.
Beware - There are lots of foxes around this campsite and they are very crafty. They will go into your camp when you are there, but not looking. They will steal anything that is not nailed down; one of their favorites is SOCKS. "Foxes Love Soxes!" is my saying. I actually hiked around in the bushes on the edge of the campground over the edge of the hill. I found a half dozen socks, a pair of shorts, toothpaste, a teabag, sunblock, food bags and foil that had been stolen by the foxes and squirreled away beneath the chaparral for investigation.